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What do I do if I feel sick?

Most minor illnesses get better with rest and fluids. Know the warning signs that mean you should get care right away.

Self-care first

Do this now

  1. Check for emergency signs (see the red box). If you have any, call 911.
  2. Rest and stay home from work or school so you don’t spread germs.
  3. Drink fluids often — water, broth, or an oral rehydration drink.
  4. Take your temperature and write down your symptoms and when they started.
  5. Call a doctor, nurse line, or telehealth service if you’re not sure what to do, or if you’re getting worse.
Call 911 if:
  • Trouble breathing, or chest pain or pressure
  • Sudden weakness, numbness, face drooping, or trouble speaking (possible stroke)
  • Confusion, fainting, or being very hard to wake
  • A sudden, severe headache, or a headache with a stiff neck and fever
  • Vomiting blood, or severe belly pain
  • Signs of a severe allergic reaction, like swelling of the face or throat

See a doctor or go to urgent care if

  • You have a fever of 103°F (39.4°C) or higher, or a fever that lasts more than a few days
  • You can’t keep fluids down, or you have signs of dehydration (very dark urine, dizziness, dry mouth)
  • Symptoms get better, then come back worse
  • You have pain when peeing, a rash, or ear or sinus pain that won’t go away
  • You are pregnant, older than 65, or have a long-term condition like diabetes, heart disease, lung disease, or a weak immune system
  • You just don’t feel right, and it’s not getting better

Guides by symptom

Not sure where to go? See choosing the right care or find care near you.

Medicine safety

Over-the-counter medicines can ease symptoms. Follow the package directions, and check labels so you don’t take the same ingredient (like acetaminophen) in more than one product. Ask a pharmacist if you take other medicines or have health conditions.

Sources

Last reviewed October 14, 2026. General information only, not medical advice. Read the disclaimer.